121245556 has 24 divisors (see below), whose sum is σ = 216838944. Its totient is φ = 59298720.

The previous prime is 121245541. The next prime is 121245583. The reversal of 121245556 is 655542121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93271 + ... + 94561.

It is an arithmetic number, because the mean of its divisors is an integer number (9034956).

Almost surely, 2^121245556 is an apocalyptic number.

It is an amenable number.

121245556 is a deficient number, since it is larger than the sum of its proper divisors (95593388).

121245556 is a wasteful number, since it uses less digits than its factorization.

121245556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1789 counting only the distinct ones).

The product of its digits is 12000, while the sum is 31.

The square root of 121245556 is about 11011.1559792785. The cubic root of 121245556 is about 494.9431026668.

Adding to 121245556 its reverse (655542121), we get a palindrome (776787677).

It can be divided in two parts, 121245 and 556, that added together give a square (121801 = 349²).

The spelling of 121245556 in words is "one hundred twenty-one million, two hundred forty-five thousand, five hundred fifty-six".